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Biogenesis of Glucobrassicin, the in vitro Precursor of Ascorbigen
Investigation of some biochemical interrelations of indole derivatives in Brassica oleracea L. by means of labelled (radioactive) compounds finds that the reaction of glucobrassicin with ascorbic acid in the presence of enzymes (myrosinase) set free in the damaged plant tissue is so rapid as to make impossible the proof of the presence in the fresh juice. Expand
Biogenesis of Ascorbigen, 3-Indolylacetonitrile and Indole-3-carboxylic Acid from D,L-Tryptophan-3-14C in Brassica oleracea L.
In preliminary experiments, the level of ascorbigen in kohlrabi was raised after the injection of tryptophan into the bulb, and the hypothesis was put forward that this amino-acid, as well as 3-indolylpyruvic acid, may be the precursor of the synthesis in vivo of asCorbigen. Expand
Phenolic Substances and Their Possible Role in Plant Growth Regulation
In relation to their effect on growth processes, plant phenols may be divided into three groups: promotive, inhibitory, and inactive. Promotion of plant growth by phenols may proceed through theExpand
Growth-correlative effect of the root on the apical part of the epicotyl in pea seedlings regarding the IAA content and L-tryptophan aminotransferase and L-tryptophan dehydrogenase activities
A growth-correlative effect of the root becoming evident in dependence on plant ontogenesis in changes of IAA content and activities of the above enzymes catalysing IAA synthesis is indicated. Expand
Effects of acute gamma irradiation on the concentration of amino acids and protein-nitrogen in Zea mays
Hybrid corn seeds were irradiated with 0, 5, 10, 15 and 20 kR of 60 Co gamma rays and the totals of free amino acids of 10-day-old seedlings increased significantly and several of the bound amino acids in shoots increased significantly at all exposures. Expand
Comparison of Anthranilate Synthase Activity and lAA Content in Normal and Auxin-habituated Dioscorea deltoidea Tissue Cultures
The present results are not pointing to a simple explanation of the habituation process in Dioscorea deltoidea by a direct rise of the IAA synthesis from accumulated L-tryptophan in the auxin-habituated line. Expand
Biosynthesis of the glucobrassicin aglycone from14C and15N labelled L-tryptophan precursors
The formation of the isothiocyanate group of the aglycone of glucobrassicin (Glubr) an indole glucosinolate present in relatively large quantities in plants of the familyBrassicaceae, was studied.Expand
Transaminase GOT and GPT activity in extirped sprouts of normal and opaque-2 Maize (Zea mays L.) seedlings
It seems that the increased transaminase activity in the sprouts of genotype opaque-2 is genetically determined, and does not result from an induction of enzyme synthesis through the supply of amino acids translocated from the endosperm to the sprout. Expand
Cholinesterase activity in some species of theAllium genus
In partly purified protein complexes obtained from 22 species of theAllium genus and 6 cultivars ofAllium cepa the activity of cholinesterases was detected and measured using the method of Ellman etExpand
L-tryptophan aminotransferase and L-tryptophan dehydrogenase, enzymes of IAA synthesis, in normal and tumorous tobacco tissue cultures
It does not seem probable that TAT and TDH represent the key enzymes responsible for the strong increase of the IAA content in the tumor strains, but normal tissue cultures as well as crown-gall tissues preserve their ability to synthesize auxin by the IPyA pathway characteristic of eukaryotes. Expand